Extending Prism to a new language is not working.
I followed the documentation instructions:

1. I updated prism_syntax_highlighting = true in the config.toml file.
2. I downloaded prism 1.28 with a new language.
3. I copied the new prism.js and prism.css to static/js and static/css respectively.
4. I ran the command hugo server
   and nothing happens. The old prism 1.21 version was not replaced by the new version.

I run macOS on M1 MacBook Air.